Support for vacuum tubes



Se t. 25, 1928.

J. H. MOSHER SUPPORT FOR VACUUM TUBES Filed June 2, 19

Invent es H. Mosher;

Z omey.

His Att Patented Se t. 25, 1928.

UNITED STATES PATENT OFFICE.

IAIES H. KOSHER, OF SGHENECTADY, NEW YORK, ASSIGNOB TO GENERAL ELECTRICcomm, A CORPORATION OI NEW YORK.

SUPPORT FOR VACUUM TUBES.

Application fled June a,

My present invention relates to supports for electric discharge devicesandmore particularly to a support and shielding means adapts to. preventthe transmission of external vibrations to the electrodes of dischar edevices.

Vi rations transmitted to a discharge device tend to change the spacerelation of the electrodes mounted therein. Such chan es producevariations in the output'of the isvcharge device and when the device isemployed in connection with reproducing apparatus such as loud speakersand the like, seriously interfere with the operation of the reproducingapparatus and tend to make the signals reproduced therebyunintelligible.

According to the present invention, a socket adapted to support adischarge device is mounted in a standard base, or cup-shaped member, insuch a way that vibrations cannot be transmitted through the socketmember to the electrodes of the discharge device. Also, since dischargedevices are frequently so mounted that they are not only affected bymechanical vibrations but also by sound waves emitted from loud speakersassociated therewith, a shielding means is provided which completelysurrounds the discharge device and is ada ted to absorb any sound waveswhich woul ordinaril be transmitted to the glass enclosure of theischa'rge device.

The novel features which I believe to be characteristic of my inventionare set forth in the appended claims. My invention itself, however, willbest be understood from reference to the following specification takenin connection with the accompanying drawing in which Fig. 1 is a crosssectional view of the support and shielding means, the discharge devicebeing shown in elevation; Fig. 2 is an exploded view of the support andshielding means for the discharge device; while F1 3 is a plan view ofthe standard base mem er with the socket for the discharge devicemounted therein.

Referring to the drawing, I have indicated at 1 an insulating cup-shapedmember or base of standard form which is provided with four hollowterminals 2. An insulating socket member 3, which comprises upper andlower sections 4 and 5 respectively, joined together by a central rivet6, is adapted to be mounted in the base 1. A plurality of coil 1826.Serial No. 118,821.

springs 7 is inserted in base 1 and supports the socket member 3therein. Each spring is electrically connected at one end to one of thehollow terminals 2 and at the other end to a metallic member 8 mountedin socket 3. A portion of each member 8 is bent outward- 1y, asindicated at 9, and soldered to the upper portion of spring 7.

'Base 1 is provided on its periphery with a plurality of relativelylarge openings 10 and a projecting portion 11, as indicated in Figs. 2and 3. In the assembly of the socket and base the lower ends of the srings 7 are first soldered to the hollow terminals 2. Pins 12 are theninserted through openings 10 and driven into the lower portion 5 of thesocket member 3 and thereafter serve to limit the longitudinal movementof the socket member in the base 1. When a tube or discharge device 13isinserted in socket member 3 the latter member is depressed until thepins 12 engage the lower portions of openings 10, after which the tubemay be firmly inserted into the socket. Likewise, when the tube isremoved, pins 12 engage the upper portion of openings 10 and permitremoval of the tube without causing any distortion or damage to thespring supports.

means 7 prevent transmission of mechanical vibrations through socketmember 3 to the discharge device, vibrations from reproducing apparatusassociated with the discharge device may affect its operation due tosound waves striking the glass enclosure of the discharge device. Inorder to absorb such vibrations a relatively thin elongated metallic capor cover 14 having depending fingers 15 is mounted on the base orcup=shaped mem er 1. The interior of the cap is provided with a heavyfelt lining 16 which effectively prevents any transmission of vibrationsto the glass wall of the discharge device 13. The cap is slidablymounted upon and snugly fits the open end of the base 1, the dependingfingers being so spaced as to accommodate the projecting pins 12. Theprojecting portion 11 on base 1 engages one of the openings betweenfingers 15 and serves as a guide for the cap 14. Any vibrations strikingcap 14 are either absorbed in the felt lining or are transmitted to thebase 1 and absorbed in the spring supports 7. The discharge device 10While the springs or flexible supporting is therefore completelyshielded from all forms of external vibrations, thus providing adischarge device in which the space relation of the electrodes ismaintained substantially constant.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is,-

1. In combination, a cup-shaped member provided with a plurality ofprojecting terminals, a socket flexibly mounted in said member andadapted to support an electric discharge device, means electricallyconnecting said socket and terminals, and a cap mounted on thecup-shaped member and adapted to substantially enclose said electricdischarge device, said cap being provided with means adapted tosubstantially prevent transmission of vibrations therethrough.

2. In combination, a cup-shaped member provided with a plurality ofprojecting terminals, a socket flexibly mounted in said member andadapted to support an electric discharge devicc, means electricallyconnecting the socket and terminals, and a cap slidably engaging thecup-shaped member and substantially enclosing said electric device tothereby prevent the transmission of external vibrations to said device.

In witness whereof, I have hereunto set my hand this 29th day of May,1926.

JAMES H. MOSHER.

